Muffle-flattening oven and leer



-E. E. MILNER AND w. J. LYTLE.

MUFFLE FLATTENINQ OVEN AND LEER.

APPLICATION FILED AUG.I2. I921,

' Patented Aug. 15, 1922.. v 3

3 SHEETSSHEIET 1.

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omen STATS OFFICE.

EDWIN E. MILNEB; OF SCOTT TOWNSHIP, AND WILLIAM J. IIYTLE, F ROSSIYN FARMS BOROUGH, ALLEGHENY -COUNTYQ, PENNSYLVANIA, ASSIGNORS T0 H. L. DIXON COMPANY, OF CARNEGIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

MUFFLE-FLATTENING 0mm LEER.

Specification of Letters I Patent.

Application filed August 12, 19 21. Serial No. 491,701.

exact description.

Our invention relates to muflieflattening' ovens and leers, andparticularly to muffle flattening ovens} and leers for treating glass.

An object of our invention is such a device wherein the fines are muffled for heat ing the glass roller.

A further object of our invention is such a device wherein the flattening oven has the highest temperature of any part of the device. 4

A further object of our a device-wherein the piling stationhas the lowest temperature, -means being provided for increasing the temperature of the piling station as described. I

A further object of our invention is such a device wherein each flue is provided-with an independent regulator.

A further object of our invention is such a device wherein a uniform'temperature is secured and which temperature is under the control of the operator.

Furthermore the device is economical in operation and the arrangement is-such that by reason of the individual regulation of the flues a higher temperature may be maintained at the doors so as to offset the natural tendency of that partof the device to ingr our invention;

igure 2 is a section on line IIII of Fi ure 1; and

igure 8 is asection on line III-F-III' of Figure l.

. The device comprises a foundation lupon which the device is carried. Placed upon the foundation 1 are side walls 2. Mounted upon the central foundation member 1- is 3 a shaft 3 which carries supportlng mem-- bers 4 upon which is placed a refractory invention is such flattened. Rods 6 connect the outer ends of the members J tothe shaft 3. Thes'haft 3 'lsprovided witha bevel gear 7 which meshes with a gear 7 mounted on the shaft 8 and journaled at 8? and operated through Patented Aug. 15,1922.

' member 5, and upon which the articles are a sprocket 9 from any suitable source of power for rotating the shaft 3 and the memher 5. I The area over the'turn table is di-' vided into four compartments A, B, C and D; The compartment A is the flattening oven; B is the piling station; Cis the first rod station and D is a" dummy oven. This space .is d vided by the overhanging partitions 10 supported by any suitable means.

with a burner 13, supplied from a gas flue 14, and provided with air through the con duit 15. Each of the flues 11 has a separate combustion chamber 16 and also two offtakes 17 and 18. The offtakes 17 and 18 are rovided with'dampers' 19 and: 20 conj trolled by any suitable means. The ofitakes 17j,on the difl'erent flues communicate with. a header 21 and likewise the offtakes 18 communicate with a header 22, I and the headers 21 and 22 v communicate with a stack 23.

As shown in F igure 3, a shade stone 24 is provided along'the region of the device where the combustion chambers 16 COIIb municate with the flues. shade stone is to protect the glass roller 25, shown in dotted lines in Figure 3, from too high a temperature immediately upon being placed in the device. Furthermore, the

, highest temperature in the flue is in the region of the juncture of the combustion chamber 16 with the flues and the rollers are therefore protected against this high temperature by the shade stone.

Figure 1 shows the arrangement wherein the roller is introduced'into the flattening oven by the tool 26,- by which the roller is pushed into the flattening oven in any suitable manner.

The operation of the device is as follows:

The roller or shawl is introduced by the tool 26. The article is flattened on the The object of this fconducted to the piling station B by re-.

as rneasoe stone 5 in the flattening oven A and is then volving the stone 5. At this'point, the flat sheet is lifted off the stone by means of a usual piling fork and placed on the rods in the first rod station C, and is then carried by the rods 27 through the annealing. leer 28, part of which is shown in Figure 1.

Each of the flues 7 has independent means for'controlling the temperature thereof, the means comprising the dampers 19 and 20. If it is desired to vary the temperature of the compartment of the piling station, this may be done by properly manipulating the dampers l9 and 20. If, for instance, the temperature of that compartment is lower than required, the damper 19 may be closed and the damper 2O opened so that the gases will pass throughthe entire length of the flues 10 and raise the temperature of that compa'rtment substantially to that of the flattening oven compartment. If it is desired to decrease the temperature of the compartment B, the damper 20 may be closed partially or altogether, and the damper 19 opened so that the heating gases will pass through only a portion of the flue 11, thus allowing the temperature of the compartment B to decrease. These temperatures may be further controlled by controlling the supply of fuel to the flues.

From the foregoing, it will be apparent that our invention has many advantages, among which may be mentioned that the temperature may be uniformly regulated and varied in the different compartments; by reason of the mufl le construction and the 'individual temperature control, great economy is effected in fuel consumption, as the drafts incident to a direct heating arrangement are avoided; by reason of the individual tem- -perature control, the flues near the doors where the articles are introduced and removed may be at a higher temperature than the other flues, thus tending to create a tendency for the hot gases to flow out of the device instead of permitting the cold air to rush thereinto; the advantages of the shadestone are secured thus eliminating breakage due to-high temperatures or too rapid rise of temperature upon introducing the article into the-device.

Further advantages will be apparent to those skilled in the art. I 1

While we'have shown and described the preferred form of our device in detail, it will be understood that we are not limited to the exact arrangement and construction shown and described, as many changes may be made in the details without departing from the spirit of our invention.

We claim:

I 1. A flattening oven comprising a flattening stone,'a chamber above said stone and means for indirectly heating said chamber.

.chambers to different temperatures.

3. A flattening oven comprising a flattening stone, a chamber above said stone, means subdividing said chamber into a plurality of parts and means for indirectly heating said parts to different temperatures.

4:. A flattening oven comprising a rotatable flattening stone, a chamber above said stone and means for heating said chamber indirectly and means for rotating said stone.

5. A flattening oven comprising a flattening stone, a chamber above said stone, means dividing said chamber into a plurality of parts, means for indirectly. heating said parts to difl'e'rent temperatures and means for rotating-said stone to, place a given point Itherein in any one of the parts of said cham- 6. A flattening oven. comprising a flattening stone, a chamber above said stone, and a plurality of flues in the top wall of said chamber for heating the chamber.

7. A flattening oven comprising a flattening stone, a chamber above said stone, means dividing said chamber into a plurality of parts, flues in the top wall of said chamberfor heating said parts to a different temperature, and means for controlling the passage of heating gases through said flues to vary the temperature in said parts.

8. A flattening oven comprising a flattening stone, a chamber above said stone, heating flues in the top wall of saidchamber and an individual combustion chamber for each of said flues.

9. A flattening oven comprising a flattenplurality of flues in the top wall of said chamber, a combustion chamber for each of said flues, and a shade stone near the junc- 1t lure of each combustion chamber with its 10. A flattening oven comprising a flattening stone, achamber above said stone, a plurality of flues in the top wall of said chamber, a combustion chamber for each of said flues, a shade stone near the juncture of each combustion chamber with its flue, and means producing combustion in said combustion chamber.

11. A flattening oven comprising a flattening stone, achamber above said stone,means 1 20 dividing said chamber into a plurality of parts, flues in the top wall of said chamber extending across a plurality of said parts, and means for directing the heating gases in said flues over one or more than one of said parts. I 12. A flattening oven comprising a flattening stone, a chamber "above said stone, means dividingsaid chamber into a lurality of parts, a plurality of flues in t 9 top 1 wall of said chamber, and a plurality of oil'- takesfor each of said flues.

13. A flattening oven comprising a flattening stone, a chamber above said stone,

means dividing said chamber into a plurality ofparts, a plurality of flues in the top Wall of said chamber, a plurality of off-takes for each of said flues, and means for controlling the flow of gases through one of said off-takes.

14. A flattening oven comprising a flat tening stone, a chamber above said stone, means dividin-g said chamber into a plurality of parts, a plurality of flues in the top Wall of said chamber, a plurality of olftakes for each of said flues, and means in each of said ofl-takes for controlling the passage of gas therethrough.

15. A flattening oven comprising a flattening stone, a chamber above said stone, a plurality of flues in the top wall of said chamber, and means for independently regulating the temperature of each of said'flues.

16. A flattening oven comprising a flattop Wall of said chamber, and means regulating the passage of heating gases through said flues to regulate the temperature of each of the parts of said chamber; 1

17 A flattening oven comprising a flattening stone, a chamber above said stone, a plurality of flues in the top wall of said chamber, an off-take at one end of each of said flues and an off-take for each of said flues intermediate its ends.

18. A flattening oven comprising a flattenin stone, a chamber. above said stone, a plurality of flues in the top Wall of said chamber, an ofl-take at one end of each of said flues and an oif-take for each of said flues intermediate its ends, and means for re ulati the flow of gases in said ofl-takes.

- n testimony whereof, We have hereunto set our hands.

'- EDWIN E. MILNER. WILLIAM J. LYTLE. 

